Help please! What is the molarity of HCl if 39 mL of the solution is titrated with 72.1 mL of 0.543 M NaOH?

Arectangle has a diagonal 20 inches long that forms angles of 60 and 30 with the sides. find the perimeter of the rectangle. for geometry

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals

Can someone me out on this question for my national 5 chemistry homework